Core-making device.



W. M. SCOTT & W. JOHNSTON.

CORE MAKING DEVICE.

APPLICATION FILED APB..18,1914.

1,104,837. Patented July 28, 1914.

THE ['JUWRIS Fh TENS ("(7 PHU'ITLLITHO WASHING IUN. U r

UNITED STATES PATENT ()FFIGE.

WESLEY M. SCOTT AND WILLIAM JOHNSTON, 0F DAYTON, OHIO.

ooRE-MAKING DEVICE.

To all whom it may concern:

Be it known that we, WESLEY M. SooTT and WILLIAM JOHNSTON, citizens of the provements in Core-Making Devices, of which the following is a specification.

This invention relates to new and useful improvements in core-making devices.

The principal object of our invention is to provide a simple, cheap and eflicient device for making cores for foundry and other purposes. Its compactness and simplicity of operation, renders it a labor saving device of the highest order in the c0re-making art.

Gther important and incidental objects will be brought out in the following specification and particularly set forth in the subjoined claims.

One embodiment of our invention is illustrated in the accompanying drawings, of which Figure 1 is a perspective view of the core barrel and receiver. Fig. 2 is a View in elevation, of the plunger and vent rod. Fig. 3 is a plan view of the plunger in position within the barrel and receiver, a portion of the wall of said barrel being broken away to show the core, and Fig. 4 is a view in elevation, showing the method of pushing the core out upon the receiver by the plunger.

Throughout the specification and drawings, similar reference characters denote corresponding parts.

In a detailed description of that embodiment of our invention disclosed in the drawings, 1 designates a core barrel preferably constructed of metal. Preferably integral therewith is a longitudinally disposed trough-shaped receiver 2, whose interior surface is flush with that of the barrel 1. The barrel 1 and receiver 2 are preferably formed by cuttin a semi-cylindrical portion from one end of a piece of tubing, whose bore is made to correspond to the size and shape of the core to be produced. It is to be understood that the barrel 1 may be constructed of any size or shape without departing from the spirit of our invention. Adapted to be slidigly moved from the receiver 2 into the barrel 1, is a plunger 3 preferably constructed of metal. To one end of the plunger 3 is secured a ferrule 4, while the other end is provided with a head 5.

Specification of Letters Patent.

Application filed April 18, 1914.

Patented July 28, 1914.

Serial No. 832,807.

The head 5 has a relatively tight fit within the barrel 1, and is constructed of a size and shape which conforms to the desired size and shape of that end of the core which bears against it in thebarrel. Contained within the plunger 3 is a longitudinal hole 6 which extends through the head 5 and well into the interior portion of said plunger. This hole is adapted to receive a vent rod 7 containing graduations 8 on its outer periphery, by means of which the end of said rod may be located at desired distances from the head 5. (See Fig. 2). Extending into the plunger 3, in a position to engage the rod 7, is a countersunk set-screw 9 by means of which said rod may be held in any of its adjusted positions. One side edge of the re ceiver 2 is likewise provided with graduations 10, by means of which the plunger 3 may be moved a predetermined distance into the barrel 1.

In operation, the lunger 3 is moved from the receiver 2 into t e core barrel 1, a sufficient distance to form a core of the desired length. It is to be observed that the length of the core will always be the distance between the plunger head 5 and outer end of the barrel 1,.and this distance may be ac curately determined before-hand by posi tioning the ferrule 4 relative to the graduations 10. When the plunger head 5 has been extended into the barrel 1 the desired dis tance, the ferruled end of the plunger and the receiver are tightly grasped by the hand or hands to prevent the head 5 from moving in either direction from its set position within the barrel. The open end of the barrel 1 is then thrust down one or more times upon the wet sand, whereupon the latter will be forced into said barrel against the plunger head 5 and around the rod 7, to form a core 11 (see Fig. 3).

By means of the rod 7, a vent hole will be formed in the core 11 of sufficient size to readily permit the escape of gases when said core is afterward heated. The rod 7 may also be extended a sufficient number of graduations beyond the head 5 to produce a vent hole of the desired length, or to determine the length of the core if it is desired that the vent hole extend completely through the latter. In the last named instance, if the end of the rod is set at the end of the barrel, the length of the core will correspond to the distance that the end of said rod extends beyond the plunger 5. After the core 11 is formed within the barrel 1,

the plunger 3 is withdrawn, and in a reversed position moved into the other end of therefrom in a suitable place (see Fig. 4,).

It will now be seen that by one or more simple and quick operations, the wet sand may be packed tightly against the plunger head 5 within the barrel 1, to form a 'core which is properly ventilated by the rod 7. The removal of the core isthen easily accomplished by forcing the plunger into the other end of the barrel 1, in a reversed posi tion. This simple method'of makingcores is efficient as well as labor-saving. I

We do not wish to be limited to the details of construction and'arrangement herein shown and described, and any changes or modifications may be made therein to suit different conditions of use.

Having described our invention, we claim:

1. A core-making device comprising a hollow member, a receiver secured to said member, a plunger movable from said receiver into the hollow member, and penetrating means carried by said plunger to produce a vent hole in the core.

2. A core-making device comprising a hollow member, a plunger movable into and out of said member, a trough-shaped extension on said member to receive the plunger and core, and a rod secured to said plunger to produce a vent hole in said core.

3. A core-making device comprising a barrel, a semi-cylindrical receiver secured thereto, a plunger movable from said receiver into'said barrel, and a rod carried by said plunger to produce a vent hole in the core. I

In testimony whereof we have hereunto set our hands this 16th day of April, A. D.

WESLEY M. SCOTT. 7 WILLIAM JOHNSTON. l/Vitnesses:

YVVVALTER V. SNYDER, HOWARD S. SMITH.

Copies of this patent may be obtained for five'cents each, by addressing the Commissioner of Patents, Washington, D. 0." 

